wavel.	cross sect.	error limit

184.8	4.24e-19	0.32e-19
213.9	8.24e-20	0.11e-20
228.0	4.50e-20	0.14e-20
248.0	2.00e-20	0.30e-20
254.0	1.49e-20	0.02e-20